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How To Control Drain Fliesdrain fly

It can be a startling experience to be standing in front of your sink brushing your teeth and then see flies begin to emerge from the drain. These yucky insects are known as drain flies and while they are harmless, they can be rather annoying to deal with. If left untreated, their numbers can grow and you’ll be seeing a lot more of them.

Drain flies are also known as moth flies, sewer flies or filter flies and thrive in areas where there is lots of moisture and organic matter, which makes drains and sewer lines a perfect hangout spot for them. These tiny flies are about an 1/8th of an inch and are usually black, but may also be colored brown. The distinguishing feature of the drain fly is the unique pattern of veins in its wings.

Drain flies frequent drains and plumbing because they are attracted to the drain buildup which forms over time. This decaying organic matter is a source of food for drain flies as well as a prime area where they like to breed. Contrary to popular belief, these flies don’t come up from the drain but rather come from outside once they smell the organic matter.

If your drains are becoming a hangout spot for drain flies, you can eliminate them with the help of professional-grade control products from Solutions Pest and Lawn. We can also help you with free how-to advice so you can confidently take care of this pest problem yourself.

How To Get Rid of Drain Flies: 3 Step Solution

Drain fly control can be rather easy if you have the right approach in place. If you approach it in a way where you just buy some spray and try to spray flies to death, you’ll achieve little success and they’ll keep coming back until you address the reason why they are coming in the first place: the scum buildup in your drains. Once the scum buildup is cleared up, drain flies will not want to stick around. We have three simple steps you can follow to clear out your drain fly problem which we will share with you below:

Step 1: Get rid of the drain scum, you’ll get rid of the drain flies. The buildup of gunk in your drains are the reason the drain flies are around so cleaning and breaking down the organic matter will repel the drain flies. We recommend using a concentrated drain gel such as Drain Gel which is specifically designed to breakdown organic matter built-up in sinks, drains and garbage disposals and other areas where drain flies harbor and reproduce. This product should be applied every night for at least 5 nights for maximum effect. Adding Gentrol into the sink can help to prevent future reinfestations of drain flies.

Step 2: Contact kill adult drain flies with insecticide spray. After you have treated your drains, the drain flies that are still alive will escape the drains and will be flying around. By using a space spray, you can treat the remaining flies. We recommend an aerosol like PCO Fogger, a pyrethrum-based spray like Novacide to surfaces for a quick kill. If you'd rather not use chemicals, we suggest using Musca-Stik traps as an alternative. We recommend that after spraying, you leave the room temporarily to let the area ventilate before re-entering.

Step 3: With your drain fly problem now under control, it is time to implement preventative measure to ensure drain flies don’t return. The way to do this is by regularly cleaning your drains with drain cleaner and not allowing gunk and scum to build up. Also keep rarely used drains covered with a plug to prevent drain flies from seeking out the drain.

Browse our drain fly control products below. If you have any questions or concerns regarding making an order or would like live DIY advice from trained pest control experts, give us a call, shoot us an email or live chat with us online. We’ll be happy to assist you.


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